Question 1

Which of the following best describes the difference between the origin and insertion of a skeletal muscle?

Accepted Answer

Origin is the attachment point that does not move during contraction, while insertion is the point that moves.

Question 2

Which muscle is primarily responsible for jaw closure during mastication?

Accepted Answer

Temporalis

Question 3

Smooth muscle tissue is found in all of the following locations EXCEPT:

Accepted Answer

Walls of the heart

Question 4

Which of the following factors increases the force of muscle contraction?

Accepted Answer

Muscle fibers with sarcomeres at 80–120% of their normal resting length

Question 5

What is the role of gap junctions in smooth muscle tissue?

Accepted Answer

They electrically couple cells, allowing ions and electrical signals to pass between them.

Question 6

Which muscle group is responsible for flexing and supinating the forearm?

Accepted Answer

Biceps brachii, Brachialis, Brachioradialis

Question 7

During aerobic (endurance) exercise, which of the following adaptations occurs in skeletal muscle?

Accepted Answer

Increase in muscle capillaries

Question 8

Which of the following is TRUE regarding the regulation of smooth muscle contraction?

Accepted Answer

It is controlled by nerves, hormones, or local chemical changes.

Question 9

Which muscle is a prime mover for arm abduction?

Accepted Answer

Deltoid

Question 10

A patient presents with difficulty in lateral rotation of the thigh. Which muscle is most likely affected?

Accepted Answer

Gluteus maximus

Question 11

Which of the following statements about muscle levers is correct?

Accepted Answer

Effort farther than load from fulcrum operates at mechanical advantage.

Question 12

Which muscle group is responsible for extension of the knee?

Accepted Answer

Quadriceps group

Question 13

Which of the following is a function of the pelvic diaphragm?

Accepted Answer

Seals the inferior outlet of the pelvis

Question 14

Which muscle is involved in plantar flexion of the ankle?

Accepted Answer

Gastrocnemius

Question 15

Which of the following best describes the arrangement of fascicles in a muscle that closes the lips?

Accepted Answer

Circular

Question 16

Which muscle is NOT part of the rotator cuff?

Accepted Answer

Deltoid

Question 17

Which of the following is a synergist muscle for elbow flexion?

Accepted Answer

Brachialis

Question 18

Which of the following is TRUE about the buccinator muscle?

Accepted Answer

It assists in chewing by holding food between teeth during mastication.

Question 19

Which muscle is responsible for dorsiflexion of the foot?

Accepted Answer

Tibialis anterior

Question 20

Which of the following statements about smooth muscle contraction is correct?

Accepted Answer

Smooth muscle maintains moderate contraction for prolonged periods with little energy cost.

Chapter 10: The Muscle System – Structure, Function, and Major Muscles

Study Guide - Practice Questions